.layout {
    width: 750px;
    height: 300px;
    margin: 50px auto;
    border: 1px solid #ccc;
    border-top: 0;
    overflow: hidden;
}

.layout li {
    width: 20%;
    height: 150px;
    line-height: 150px;
    float: left;
    text-align: center;
}

.layout li a {
    background-color: #f4f4f4;
    color: #888;
    height: 150px;
    border-top: 1px solid #ccc;
    border-left: 1px solid #ccc;
    margin-left: -1px;
    display: block;
}

.layout li a:hover {
    background-color: #fff;
    color: red;
}

@font-face {
    font-family: "imooc-icon";
    src: url("../fonts/icomoon.eot"); /* IE9 兼容模式 */
    src: url("../fonts/icomoon.eot?#iefix") format("embedded-opentype"), url("../fonts/icomoon.woff") format("woff"), url("../fonts/icomoon.ttf") format("truetype"), url("../fonts/icomoon.svg") format("svg");
    font-weight: normal;
    font-style: normal;
}

.imooc-icon {
    font-family: "imooc-icon";
    font-style: normal;
    font-weight: normal;
    font-size: 64px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.icon-music:before {
    content: "\e605"
}

.dianying:before {
    content: "\e606";
}

.icon-pacman:before {
    content: "\e607";
}

.icon-feed:before {
    content: "\e608";
}

.icon-file:before {
    content: "\e609";
}

.icon-paste:before {
    content: "\e60a";
}

.icon-folder:before {
    content: "\e60b";
}

.icon-calculate:before {
    content: "\e60c";
}